This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX35, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI100 Standard Cylinder SI100AX35
The AirTAC Airtac SI100 Standard Cylinder SI100AX35 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 35mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX35, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX35
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI100 Standard Cylinder SI100AX35
The AirTAC SI100AX35 is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 35 mm stroke. It delivers a push force of 3927 N and pull of 3681 N at 0.5 MPa, operating through a G1/2 port. The direct replacement is the SAI100AX35, matching the bore, stroke, force, port and ISO 15552 mounting interface for a seamless fixture swap.
This specific SKU features a SUS420J2 stainless steel piston rod for corrosion resistance but lacks a magnet, so it cannot accept position sensors. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life.
Airtac SI100 Standard Cylinder SI100AX35 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX35 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX35 |
| Bore size | Ø100 mm |
| Stroke | 35 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100AX35 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100AX35 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100AX35
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×35 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI100 Standard Cylinder SI100AX35 Is Used
Heavy Press Operations
Applies 3927 N of thrust at 0.5 MPa for securing heavy components during stamping or forming processes.
Pallet Diversion
Short 35 mm stroke actuates robust routing gates to redirect heavy pallets along high-throughput lines.
Load Ejection
Pushes finished goods weighing up to 200 kg off processing beds using the SUS420J2 stainless rod.
Replacing the Airtac SI100 Standard Cylinder SI100AX35 with the SAI100AX35
To replace the SI100AX35, order the SAI100AX35 and verify the ISO 15552 mounting interface, 100 mm bore, 35 mm stroke, G1/2 port (PT/G/NPT) and mounting accessories. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; order a magnet-equipped SAI if sensing is needed. If downsizing, a 80 mm bore yields 2513 N push at 0.5 MPa; if upsizing, a 125 mm bore provides 6136 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. The SAIF variant (bores 32-100) integrates a 4M valve if space is tight.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX35
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100AX35 FAQ
Yes, the SI100AX35 is discontinued. The direct replacement is the SAI100AX35. It shares the same ISO 15552 mounting interface, 100 mm bore, 35 mm stroke, output force, G1/2 port and mounting accessories, fitting directly into existing fixtures.
It features a G1/2 air port and M20x1.5 rod thread. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, with a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX35
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX35 replacement — usually within 7-8 hours.